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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/base/accelerator_manager.h"
#include <algorithm>
#include "base/logging.h"
namespace ui {
AcceleratorManager::AcceleratorManager() {
}
AcceleratorManager::~AcceleratorManager() {
}
void AcceleratorManager::Register(const Accelerator& accelerator,
AcceleratorTarget* target) {
AcceleratorTargetList& targets = accelerators_[accelerator];
DCHECK(std::find(targets.begin(), targets.end(), target) == targets.end())
<< "Registering the same target multiple times";
targets.push_front(target);
}
void AcceleratorManager::Unregister(const Accelerator& accelerator,
AcceleratorTarget* target) {
AcceleratorMap::iterator map_iter = accelerators_.find(accelerator);
if (map_iter == accelerators_.end()) {
NOTREACHED() << "Unregistering non-existing accelerator";
return;
}
AcceleratorTargetList* targets = &map_iter->second;
AcceleratorTargetList::iterator target_iter =
std::find(targets->begin(), targets->end(), target);
if (target_iter == targets->end()) {
NOTREACHED() << "Unregistering accelerator for wrong target";
return;
}
targets->erase(target_iter);
}
void AcceleratorManager::UnregisterAll(AcceleratorTarget* target) {
for (AcceleratorMap::iterator map_iter = accelerators_.begin();
map_iter != accelerators_.end(); ++map_iter) {
AcceleratorTargetList* targets = &map_iter->second;
targets->remove(target);
}
}
bool AcceleratorManager::Process(const Accelerator& accelerator) {
AcceleratorMap::iterator map_iter = accelerators_.find(accelerator);
if (map_iter != accelerators_.end()) {
// We have to copy the target list here, because an AcceleratorPressed
// event handler may modify the list.
AcceleratorTargetList targets(map_iter->second);
for (AcceleratorTargetList::iterator iter = targets.begin();
iter != targets.end(); ++iter) {
if ((*iter)->AcceleratorPressed(accelerator))
return true;
}
}
return false;
}
AcceleratorTarget* AcceleratorManager::GetCurrentTarget(
const Accelerator& accelerator) const {
AcceleratorMap::const_iterator map_iter = accelerators_.find(accelerator);
if (map_iter == accelerators_.end() || map_iter->second.empty())
return NULL;
return map_iter->second.front();
}
} // namespace ui
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